7/2, Saturday. Partly sunny. Temperature is in the upper 70°Fs. Drove OR-242 for Obsidian Trail. First stop: Proxy Falls. Well signed parking area. Short trail (~1.5 mile RT). I was wearing sandals: not a good idea. The upper falls is small and ugly. The lower falls is splendid, wide and tall. Lots of rocks to play with and get sprayed on. Many people here.
Obsidian Trail starts with leveled and smooth trail in the young forest, for about 2 miles. It soon enters the the shaded area on the map, which is by permit only. I've obtained 2 day use permits, one for hiking in and one for hiking out. Overnight permits were all taken. Then trail then goes over a lava flow, slowly gaining elevation, until reaching PCT. Met a group of 4 day hikers. That's all we encountered on this Saturday. 
Turned right (S) on to PCT, hitting more snow. Soon you can see The Husband to your right (W of PCT). Turned right again at Linton Meadow trail, going downhill. Linton Meadow is lovely. Sun was already setting, casting a pink hue to South and Middle Sister. More and more mosquitoes. Eileen Lake is another half mile west, passing a couple of smaller meadows. Saw two tents at the east end of the lake. Water is very shallow (ankle deep?) and warm. Tons of mosquitoes, but they quieted down after 9:30pm. Good view of both South and Middle Sister. Need to come here after the mosquito season, and earlier in the day, for the sunset here would be beautiful. I tried to take star photos well into the night.
7/3, Sunday. Sunny. Eileen Lake bathed in the early sun looks lovely. However, too buggy. Packed everything and ran away at 7am! 
Husband Lake seems to be more than just one lake, right at the foot of The Husband. Quite pretty as well. Saw two tents at two different spots.
Linton Meadow is probably my favorite spot this weekend. It's broad and green, crisscrossed by little streams. Flowers are coming up, so are mosquitoes. Need to come back later after the bugs. Saw a girl by her tent at one of the smaller meadows, where we lost our trail. She said she was lost too. Later this day, met 2 runners, and a couple of backpackers and day hikers on PCT. Set up camp by PCT at a stream of snowmelt, with the backdrop of Middle Sister. Cooked a late breakfast / early lunch.
Climb Middle Sister. Didn't find a good approach from the west side. Ended using the SE ridge, same approach as from Camp Lake (where I started 2 years ago). Met only 2 groups (2 and 4) during my slow ascent, no one else getting to the ridge for climbing. Lots of snow getting to the ridge, but no snow whatsoever from there to the top. All rock piles, many loose. Pick your rock, no trail. Somewhat dangerous. The reward is the splendid view of South Sister, Broken Top, Camp Lake (thawed), 3 Chambers Lakes (still half frozen), all the way up. At the summit, 360° view: North Sister, Mt Washington, Jefferson, Hood to the north, to the south Mt Bachelor, Diamond Peak, and more big pools of water further. Windy. Coming down is equally dangerous. Took me 4+ hours to get to the top, and 3+ hours back to camp. 
Back to camp at 8pm. Started a camp fire. Mosquito is not as bad as by the lakes which are 1000' lower. Nice sunset to the west. Didn't bother with photographing the stars tonight.7/4, Monday. Sunny. Hiked out, and complete the Obsidian loop via PCT and Glacier Way.
This stretch of PCT is very scenic. Obsidian spring, a couple of ponds, heathers and paintbrushes, not too many mosquitoes. Good place to camp. 
Going downhill via Glacier Way to catch Obsidian Trail. Partial view of Jefferson and Washington. Back on the lava field, and out to the carpark. Continued on 242 towards Sisters. Stop at Dee Wright Observatory for photos. Lots of people here. I love this observatory with its tiny windows pinpointing the mountains they open to. Refueled at Three Creeks Brewery. Tried some seasonal beers, one of which is call experimental.
